Seventy-one patients with subacromial impingement syndrome were randomized to receive 3 weeks of low-level laser therapy (LLLT; n=37) or 3 weeks of extracorporeal shockwave therapy (ESWT; n=34). Outcomes of interest included range of motion, Visual Analog Scale (VAS) pain scores during the day and night, Shoulder Pain and Disability Index (SPADI) scores, Beck Depression and Anxiety scores, Pittsbu...